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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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 * GPL Classpath Exception:
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package cn.taketoday.expression;

@SuppressWarnings("serial")
public class MethodExpressionLiteral extends MethodExpression {

  private final String expr;
  private final Class<?> expectedType;
  private final Class<?>[] paramTypes;

  public MethodExpressionLiteral() {
    this(null, null, null);
  }

  public MethodExpressionLiteral(String expr, Class<?> expectedType, Class<?>[] paramTypes) {
    this.expr = expr;
    this.expectedType = expectedType;
    this.paramTypes = paramTypes;
  }

  public MethodInfo getMethodInfo(ExpressionContext context) throws ExpressionException {
    return new MethodInfo(this.expr, this.expectedType, this.paramTypes);
  }

  public Object invoke(ExpressionContext context, Object[] params) throws ExpressionException {
    if (this.expectedType == null) {
      return this.expr;
    }

    try {
      return context.convertToType(this.expr, this.expectedType);
    }
    catch (Exception ex) {
      throw new ExpressionException(ex);
    }
  }

  public String getExpressionString() {
    return this.expr;
  }

  public boolean equals(Object obj) {
    return (obj instanceof MethodExpressionLiteral && this.hashCode() == obj.hashCode());
  }

  public int hashCode() {
    return this.expr.hashCode();
  }

  public boolean isLiteralText() {
    return true;
  }

}
